Heat Transfer And Insulation Flashcards
1
Q
What are the 3 types of heat transfer?
A
Conduction
Convection
Radiation
2
Q
What is conduction?
A
Heat transfer in a solid due to the motion of the particles in the substance
3
Q
What is convection?
A
Heat transfer in a fluid due to circulation(convection) currents
4
Q
What causes convection currents?
A
The expansion and contraction of fluids where temperature changes cause changes in density
5
Q
What is radiation?
A
Heat transfer by infra-red waves
6
Q
What are the best conductors and why?
A
Metals are the best conductors because the contain delocalised(free) electrons
7
Q
Shiny surfaces absorb heat.
True/False
A
False
Shiny surfaces reflect heat
8
Q
Matt black surfaces are the best absorbers and emitters of ______________
A
Radiation
